#include "stdafx.h"
#include "KeyGenerator.h"

/*
	
DWORD CRC32::s_Crc32Seed[256] =
{
	0x968b26b1, 0x77073296, 0xee0e212c, 0x990951ba, 0x076dc419, 0x706af4af, 0xe963a531, 0x9e6498a3,
	0x0edb8832, 0x79dcb2a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17c8d, 0xe7b82d0d, 0x90bf8d91,
	0x1db71264, 0x6ab020f2, 0xf3b12148, 0x8cbe41de, 0x1adad47d, 0x6ddde4e7, 0xf4d4b5d1, 0x83d685c7,
	0x136c9856, 0x641b28c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066c79, 0xfa0f3d63, 0x8d680df5,
	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d747, 0xd20dd5fd, 0xa50ab560,
	0x35b5a82a, 0x42b2926c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df7c75, 0xdcdd0dcf, 0xab113d09,
	0x26d930ac, 0x51de003a, 0xc8d72180, 0xbfd06116, 0x21b4f4b5, 0x56b7c423, 0xcfda9599, 0xb8b7a00f,
	0x2802b892, 0x5f052808, 0xc1ecd9b2, 0xb10be924, 0x2f6f7c87, 0x58784c11, 0xcd611dab, 0xb6660d3d,
	0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x07b6b51f, 0x9fbfe4ac, 0xe8b0d433,
	0x7807c9a2, 0x0f20f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x786d3d2d, 0x91646cc7, 0xe6035c01,
	0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0195ed, 0x1b01a576, 0x8208fcc1, 0xf50fc477,
	0x63b0d9c6, 0x12b7e920, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d69, 0x8cd3ccf3, 0xfbd41765,
	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd896d7, 0xa4dcc46d, 0xd3d674fb,
	0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d2, 0x44042d73, 0x33036de5, 0xaaca4c5f, 0xdd077cc9,
	0x5205213c, 0x270241aa, 0xbe0b1010, 0xc90c2026, 0x5768b525, 0x206685b3, 0xbc66d409, 0xce71e49f,
	0x5edef90e, 0x29d9c208, 0xb0d09222, 0xc757a2b4, 0x59b33d17, 0x3e640181, 0xc7bd5c3b, 0xc7ba6cad,
	0xedb88320, 0x9abf23b6, 0x03b6e20c, 0x74b1229a, 0xead54739, 0x96d277af, 0x04db261b, 0x73dc168f,
	0xe3610b12, 0x94643b84, 0x0d6d6a3e, 0x7a625aa8, 0xe40ecf0b, 0x6309ff9d, 0x0a00aeb7, 0x7d079ef1,
	0xf00f9344, 0x870822d2, 0x1e01f268, 0x6926c2fe, 0xf762575d, 0x806567c5, 0x196c3b71, 0x6e6b0fe7,
	0xfed41b76, 0x89d32be0, 0x10da2a5a, 0x62dd4acc, 0xf9b9df6f, 0x8ebeef59, 0x17b7be43, 0x60b0fed5,
	0xd6d6a3e8, 0xa1d1937e, 0x3828c2c4, 0x2fdff252, 0xd1bb67f1, 0xa6bc5567, 0x3f1b06dd, 0x48bf364b,
	0xd80d2bda, 0xaf0a1b2c, 0x36034af6, 0x41047a62, 0xdf60efc3, 0xa8675f55, 0x31be8eef, 0x46f91e79,
	0xcb21b38c, 0xbc63821a, 0x2562d2a0, 0x5268e236, 0xcc0c7795, 0xbb054703, 0x2b0114b9, 0x5f05262f,
	0xc5b63bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a24, 0xc2d7ffa7, 0xb550cf31, 0xbcd99e8b, 0xfbdeae1d,
	0x9b6472b0, 0xece32226, 0x756a239c, 0x026d930a, 0x9c0906a9, 0xe50e363f, 0x7207688a, 0x0500071e,
	0x95bf4882, 0xe2b82a14, 0x7bb12bae, 0x0cb61238, 0x92d28e9b, 0xe5d5be04, 0x7cdcefa7, 0x0bdbdfe1,
	0x8613d294, 0xf1d42242, 0x68ddb2f8, 0x1fda836e, 0x81be16cd, 0xf6b9264b, 0x6fb07ae1, 0x18b74e77,
	0x88015ae0, 0xf10f6a70, 0x66063b2a, 0x11012b5c, 0x8f659eff, 0xf862a469, 0x616bafd3, 0x166cef45,
	0xa002e278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06046f7, 0x496a474d, 0x3e6e77db,
	0xae112a4a, 0xd9d651dc, 0x41df0b62, 0x31d23bf0, 0xa91cae53, 0xdeb49ec5, 0x47a2cf7f, 0x30e5ffe9,
	0xbdbdf21c, 0xca2acd8a, 0x53b39e20, 0x24bca3a6, 0xbad03b05, 0xcd4706a3, 0x5ade57e9, 0x2ed967bf,
	0xb366722e, 0xc4624ab8, 0x5d381b22, 0x2b2f2b94, 0xb4cbbe37, 0xc4cc8ea1, 0xaa0ddf1b, 0xed02ed8d
};

*/

DWORD CRC32::s_Crc32Seed[256] =
{
	0x968bd6b1, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
	0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
	0x1db71064, 0x6ab020f2, 0xf3b17148, 0x8cbe41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
	0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
	0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
	0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8b7a50f,
	0x2802b89e, 0x5f058808, 0xc6ecd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
	0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
	0x7807c9a2, 0x0fa0f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
	0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
	0x63b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
	0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
	0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
	0x5edef90e, 0x29d9c908, 0xb0d09822, 0xc757a8b4, 0x59b33d17, 0x3eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
	0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
	0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
	0xf00f9344, 0x8708a2d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
	0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
	0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
	0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x46690e79,
	0xcb51b38c, 0xbc63831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220214b9, 0x5505262f,
	0xc5b63bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
	0x9b6472b0, 0xece3f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076885, 0x05000713,
	0x95bf4882, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
	0x86d3d294, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
	0x88085ae0, 0xf10f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
	0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
	0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
	0xbdbdf91c, 0xcabacd8a, 0x53b39e30, 0x24bca3a6, 0xbad03b05, 0xcdd706a3, 0x54de57e9, 0x23d967bf,
	0xb366722e, 0xc4614ab8, 0x5d381b02, 0x2b6f2b94, 0xb4cbbe37, 0xc3cc8ea1, 0x5a0ddf1b, 0x2d02ed8d
};


DWORD CRC32::s_CrcTable[CRC32_TABLE_SIZE][CRC32_TABLE_SIZE] = {0, };
BOOL  CRC32::s_CrcInitialized = FALSE;

void InitializeCrcLookupTable()
{
	for (int seed = 0; seed < CRC32_TABLE_SIZE; ++seed)
	{
		DWORD dwPolynomial = CRC32::s_Crc32Seed[seed];

		for (DWORD i = 0; i < CRC32_TABLE_SIZE; ++i)
		{
			DWORD crc = i;
			for (int j = 8; j > 0; --j)
			{
				if (crc & 0x00000001) 
					crc = (crc >> 1) ^ dwPolynomial;
				else
					crc >>= 1;
			}
			CRC32::s_CrcTable[seed][i] = crc;
		}
	}

	CRC32::s_CrcInitialized = TRUE;
}

CRC32::CRC32()
{
	Reset();
}

void CRC32::Initialize(DWORD dwSeed)
{
	m_dwTable	= dwSeed % CRC32_TABLE_SIZE;
	
	if (m_dwTable == 0)
		m_dwTable = 1;
}

BYTE CRC32::Generate(LPBYTE pData, DWORD dwLength)
{
	DWORD dwValue = Generate32( pData, dwLength );

	WORD wHID	= HIWORD(dwValue);
	WORD wLID	= LOWORD(dwValue);

	BYTE result	= HIBYTE(wHID) + LOBYTE(wHID) + HIBYTE(wLID) + LOBYTE(wLID);
	return result;
}

DWORD CRC32::Generate32(LPBYTE pData, DWORD dwLength)
{
	_ASSERT(CRC32::s_CrcInitialized == TRUE);
	_ASSERT(m_dwTable != 0);

	if (pData == NULL)
		return 0;

	DWORD dwValue = 0xFFFFFFFF;

	for (DWORD i = 0; i < dwLength; ++i)
		dwValue = (s_CrcTable[m_dwTable][((dwValue) ^ (*pData++)) & 0xFF] ^ (((dwValue) >> 8) & 0x00FFFFFF));

	return dwValue;
}
